Taking advantage of the existing infrastructure, the objective of the current phase of the study is to assess the short and medium term impact of MIC and its cognitive determinants in comparison to SC. The occurrence of at-risk anal intercourse (unprotected anal sex with an HIV-positive partner or partner of unknown HIV status) will be measured at baseline and followed over six months. Four cognitive determinants of at-risk anal sex will also be measured: the importance that participants accord to taking the necessary steps to protect themselves from HIV, perceived personal efficacy in achieving this, intention to do so, and the extent to which participants have planned to do so.